WIP: Documentation updates

[nqthqn]

• Use require in examples (drop implied babel/ts dep)
• Use directory where elm-package.json exists, not the file itself

todo:

Working example with Elm side and instructions for running the script.

[eeue56]

This library is kinda typescript-first, so I'd prefer to keep typescript examples, and instead have Javascript examples as an "extra"

[nqthqn]

@eeue56 Maybe the readme could be sandwiched between a "BTW - Here's how you work with typescript" and an "Extra - Here's a markdown blog example"?